[2013's documentary Gore Vidal: The United States of Amnesia,] is fine memorial to one of 20th-century America’s most brilliant, original — and cranky — thinkers, “Gore Vidal: The United States of Amnesia” duly charts the late scribe’s artistic achievements and often glittering celebrity social life. But the emphasis is on his parallel persona as a harsh scold of U.S. social injustices and political corruptions.........[Gore] Vidal was raised in a family with high social and political connections.... [H]e sought fame as a novelist.........Marvelously indifferent to the notion of tact...as recalled in some delicious clips here—Vidal made no secret of his own views on sexuality, which were pretty out-there even by later Gay Lib standards. (He announced, “Sex destroys relationships … I’m devoted to promiscuity,” while living many decades with platonic companion Howard Austin.)